I don't have to wonder how little you know about football, you make it abundantly clear every time you post. You never, ever let your talented coaches go, especially for a guy who is a year or two from hanging it up anyway.
Life is tough, and as the head man, KF has to make tough decisions. He made the correct one last year promoting the most talented QB to the starting spot, and he need to promote his most talented coach to the OC position.
LOL thinking an OC has to coach "every position" including being a DC......In your world all OC's would be 50 year olds who have spent 20-25 years as an assistant....LOLOL